Some helpful UKVI links in regards to supporting documents:
Application for UK visa for family settlement: form VAF4A: https://www.gov.uk/government/publications/application-for-uk-visa-for-family-settlement-form-vaf4a
A collection of current Immigration rules: https://www.gov.uk/guidance/immigration-rules
Immigration Rules Appendix V: visitor rules: https://www.gov.uk/guidance/immigration-rules/immigration-rules-appendix-v-visitor-rules
- Afghanistan,
- Albania,
Algeria,
American Samoa,
Andorra,
Angola,
Anguilla,
Antarctica,
Antigua and Barbuda,
Argentina,
Armenia,
Armenia,
Aruba,
Australia,
Azerbaijan,
Bahamas,
Bahrain,
Bangladesh,
Barbados,
Belarus,
Belize,
Benin,
Bermuda,
Bhutan,
Bolivia,
Bosnia and Herzegovina,
Botswana,
Bouvet Island,
Brazil,
British Indian Ocean Territory,
Brunei Darussalam,
Burkina Faso,
Burundi,
Cambodia,
Cameroon,
Canada,
Cape Verde,
Cayman Islands,
Central African Republic,
Ceuta,
Chad,
Chile,
China,
Christmas Island,
Cocos (Keeling) Islands,
Colombia,
Comoros,
Congo,
Cook Islands,
Costa Rica,
Cote D’Ivoire
Cuba,
Democratic Republic of Congo,
Djibouti,
Dominica,
Dominican Republic,
Ecuador,
Egypt,
El Salvador,
Equatorial Guinea,
Eritrea,
Ethiopia,
Falkland Islands,
Faroe Islands,
Fiji,
French Polynesia,
French Southern and Antarctic Islands,
Gabon,
Gambia,
Georgia,
Ghana,
Gibraltar,
Greenland,
Grenada,
Guam,
Guatemala,
Guinea,
Guinea-Bissau,
Guyana,
Haiti,
Heard and MC Donald Islands,
Honduras,
Hong Kong,
Iceland,
India,
Indonesia,
Iran,
Iraq,
Jamaica,
Japan,
Jordan,
Kazakhstan,
Kenya,
Kiribati,
North Korea,
South Korea,
Kosovo,
Laos,
Lebanon,
Lesotho,
Liberia,
Libya,
Liechtenstein,
Macau,
Macedonia,
Madagascar,
Malawi,
Malaysia,
Maldives,
Mali,
Marshall Islands,
Mauritania,
Mauritius,
Melilla,
Mexico,
Micronesia,
Moldova,
Mongolia,
Montenegro,
Montserrat,
Morocco,
Mozambique,
Myanmar,
Namibia,
Nauru,
Nepal,
Netherlands Antilles,
New Caledonia,
New Zealand,
Nicaragua,
Niger,
Nigeria,
Niue,
Norfolk Island,
Northern Mariana Islands,
Norway,
Palestine,
Oman,
Pakistan,
Palau,
Panama,
Papua New Guinea,
Paraguay,
Peru,
Philippines,
Pitcairn Islands,
Qatar,
Russian Federation,
Rwanda,
Saint Barthelemy,
Saint Helena,
Saint Kitts and Nevis,
Saint Lucia,
Saint Pierre and Miquelon,
Saint Vincent and the Grenadines,
Samoa,
San Marino,
Sao Tome and Principe,
Saudi Arabia,
Senegal,
Serbia,
Seychelles,
Sierra Leone,
Singapore,
Solomon Islands,
Somalia,
South Africa,
South Georgia and the South Sandwich Islands,
South Sudan,
Sri Lanka,
Sudan,
Suriname,
Swaziland,
Switzerland,
Syria,
Taiwan,
Tajikistan,
Tanzania,
Thailand,
Timor Leste,
Togo,
Tokelau,
Tonga,
Trinidad and Tobago,
Tunisia,
Turkey,
Turkmenistan,
Turks and Caicos Islands,
Tuvalu,
Uganda,
Ukraine,
United Arab Emirates,
United States Minor Outlying Islands,
Uruguay,
Vanuatu,
Vatican City State,
Venezuela,
Vietnam,
Virgin Islands,
Wallis and Futuna Islands,
Yemen,
Zambia,
Zimbabwe,